Which devices are supported to use the validation stamp?

Coupontools aspires to engineer physical hardware that can be detected by - and interact with - every touchscreen-powered device in the world.

The validation stamps work on all touchscreen devices!

Bent and/or cracked phone screens have also been known to cause issues. While we have seen some success, we can't promise that stamps will work reliably on these devices.

Low Performance Devices: These devices are not currently testing well, though they will improve as we continue to hone our hardware manufacturing process. For iPads in particular, we discovered that our most recent manufacturing design fell out of spec for support of this device. We expect to remedy this in future production runs, and will keep this list up-to-date accordingly.

Apple iPhone 4

Apple iPhone 4S

Apple iPad 1st Gen

Apple iPad 2nd Gen

Apple iPad 3rd Gen

Apple iPad 4th Gen

Apple iPad Air

Apple iPad Air 2

Apple iPad Mini 1st Gen

Apple iPad Mini 2nd Gen

Apple iPad Mini 3rd Gen

Samsung Galaxy Tab 3 Lite


Individually unique stamps are not guaranteed to work on a subset of Android devices because of intricacies of each manufacturer's firmware. This can often be fixed by toggling a single default setting that allows the phone to sense more than 3 simultaneous touch events. Once that setting is changed, a small subset of unique stamps can be made to work on these devices. Contact us if you would like to explore your options.

HTC One M8

HTC One M9

Aktualisiert am: 27/01/2022